Elbow abnormalities in renal osteodystrophy.

Nine patients with renal osteodystrophy demonstrated characteristic abnormalities about the elbow consisting of subtendinous bone resorption at the sites of insertion and origin of muscles. The most striking abnormalities occurred at the insertion of the anconeus muscle, at the proximal extensor surface of the ulna, and along the posterior olecranon at the site of insertion of the triceps tendon. In three patients, the changes about the elbows were the most prominent features of hyperparathyroidism.